eve.security

Class RSAKey

java.lang.Object

eve.security.RSAKey

All Implemented Interfaces:

EncryptionKey, ByteEncodable

public class RSAKey
extends Object
implements ByteEncodable, EncryptionKey

An RSAKey holds either a private or public key and will also perform encryption/decryption operations. No data as to whether it is private or public is stored here, you can place that in a higher level object if needed.

Note that due to the nature of this encryption calling decrypt() on data generated by encrypt() on the same key will not yield the original text. With this type of encryption you can only use a key to decrypt the data encrypted by its public/private counterpart.

Use the class RSA to generate a new pair of keys.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	bitLength
protected BigInteger	exp
protected BigInteger	value

Fields inherited from interface eve.security.EncryptionKey

BIT_LENGTH_UNKNOWN

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RSAKey()
	RSAKey(byte[] encodedBytes, int offset, int length) This creates the key from the bytes as encoded by encodeBytes.
	RSAKey(String exp, String value, int bitLength)

Method Summary

Modifier and Type	Method and Description
byte[]	decrypt(byte[] encrypted, int offset, int length) Decrypt the data as encrypted by this key's counterpart.
byte[]	encodeBytes()
int	encodeBytes(ByteArray dest) Used to store the key in a stream of bytes.
byte[]	encrypt(byte[] data, int offset, int length) Encrypt the provided data optionally using salt.
int	getBitLength()
String	getExp()
String	getValue()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

exp

protected BigInteger exp

value

protected BigInteger value

bitLength

protected int bitLength

Constructor Detail

RSAKey

public RSAKey(String exp,
              String value,
              int bitLength)

RSAKey

protected RSAKey()

RSAKey

public RSAKey(byte[] encodedBytes,
              int offset,
              int length)
       throws StreamCorruptedException

This creates the key from the bytes as encoded by encodeBytes.

Throws:

StreamCorruptedException

Method Detail

getBitLength

public int getBitLength()

Specified by:

getBitLength in interface EncryptionKey

getExp

public String getExp()

getValue

public String getValue()

encodeBytes

public int encodeBytes(ByteArray dest)

Used to store the key in a stream of bytes. It is recommended that whenever the private key is stored it is encrypted using an encryption like that provided by ewe.security.Encryptor.

Specified by:

encodeBytes in interface ByteEncodable

Parameters:

dest - The destination ByteArray, or null to determine the number of bytes needed to encode.

Returns:

The number of bytes appended to the ByteArray or the number of bytes needed to encode.

encodeBytes

public byte[] encodeBytes()

Specified by:

encodeBytes in interface ByteEncodable

encrypt

public byte[] encrypt(byte[] data,
                      int offset,
                      int length)
               throws IOException

Encrypt the provided data optionally using salt.

Specified by:

encrypt in interface EncryptionKey

Throws:

IOException

decrypt

public byte[] decrypt(byte[] encrypted,
                      int offset,
                      int length)
               throws IOException

Decrypt the data as encrypted by this key's counterpart.

Specified by:

decrypt in interface EncryptionKey

Throws:

IOException